Re: [gentoo-user] Re: Poor mans audio in the world of the great Jack D.
James wirel...@tampabay.rr.com [15-05-19 03:02]: Meino.Cramer at gmx.de writes: From time to time I come across software, which directly wants to talks to good ole' alsa and get kicked by Sensei Jack D. for accessing a device, which already is occupied by him... Well, this is a different question depending if you are asking for a gentoo workstation/server or one of your 'embedded' gentoo boards? Is there any way to go or any software to install which enables me to use Jack D.'ed software and alsa-acessing without shutting down and restarting that grandmaster Jack D. ? I ran across this qt 'audio app' some time ago but have yet to download it and see what it can do. *maybe* it'll fill the need you have? media-sound/qjackctlhttp://qjackctl.sourceforge.net/ Meino hth, James And master James moved slightly and asked a simply question. Suddenly the novice was enlighted. He answers It is used for my PC. And after a while he added: I want to decode sstv and weather fax. And in the distant a little radio whispers Di da da di di da da da di da di di. And the fog raises and everything becomes clear as it was in the beginning.
[gentoo-user] Re: Poor mans audio in the world of the great Jack D.
Meino.Cramer at gmx.de writes: media-sound/qjackctlhttp://qjackctl.sourceforge.net/ And master James moved slightly and asked a simply question. Suddenly the novice was enlighted. He answers It is used for my PC. And after a while he added: I want to decode sstv and weather fax. SSTV? really? now you are just teasing an old (EE) fart? That's a real application, it just hard to keep the sync bit stable. And in the distant a little radio whispers Di da da di di da da da di da di di. Once (in my youth) I dated a young, friendly lass, named 'Candy Morse' do da da do da da..! And the fog raises and everything becomes clear as it was in the beginning. This is unknown to me; but you might find help if you get sstv audio signals parsed out of your serial line signal, if I am to speculate what you are really after? You may need a spectrum analyzer to identify and isolate the audio signal since the signal is a superposition (hybrid) signal. It might be best to filter the audio signal out in the Rf domain, as opposed to it's digital derivative signal. http://users.belgacom.net/hamradio/index.htm under software he has rx-sstv for windoz. Get it working under doz and then hunt for a linux setup, using windows to verify it all works (hardware wise) first, is one possible path. Also : http://www.dxatlas.com/SstvTools/ and in portage (just to be complete) media-radio/qsstv Also verify the chipsets used (dongle?) and their reliability at various frequencies. Those chipssets that are wideband, are always problematic, imho Most of the crap (dongles) floating around are not very good. Me, I'd go to the trouble to find a new chipset, including filters and LNAs (low noise amplifiers) to build a decoder box. You could probably sell them. If you go that route, drop to me privately. Dowload PDF - Image Communication on Short Waves www.sstv-handbook.com/download/sstv_04.pdf good hunting! James
[gentoo-user] Re: Poor mans audio in the world of the great Jack D.
Meino.Cramer at gmx.de writes: From time to time I come across software, which directly wants to talks to good ole' alsa and get kicked by Sensei Jack D. for accessing a device, which already is occupied by him... Well, this is a different question depending if you are asking for a gentoo workstation/server or one of your 'embedded' gentoo boards? Is there any way to go or any software to install which enables me to use Jack D.'ed software and alsa-acessing without shutting down and restarting that grandmaster Jack D. ? I ran across this qt 'audio app' some time ago but have yet to download it and see what it can do. *maybe* it'll fill the need you have? media-sound/qjackctlhttp://qjackctl.sourceforge.net/ Meino hth, James
